Object Position Even Looping???

I've watched the tutorial for the object position event multiple times, but there is one thing they didn't mention in the video. When I tie the x y and z data to a linear curve data source, I see that they made an option to loop the curve, which I assume means that the object would jump back to the start and would repeat the process. When I check the box it does nothing, and I get the same result with no looping. If anyone could help me loop the object I would much appreciate it. Thanks!